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This \( e^{i\pi }+1=0 \) is an inline math input in LaTeX.
This 
<trapp>
\[ \pi = \sqrt{6\sum_{n=1}^{\infty }\frac{1}{n^2}}=\left 
( \int_{-\infty }^{+\infty} e ^{-x^2}dx \right )^2
 \] 
 </trapp>
is a "stand-alone" input in LaTeX.

<rectgl>
Ben
</rectgl>

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